In the native workout editor, Garmin Connect allows for drills and equipment use for swim workouts. The equipment available is Fins, Kickboard, etc. The practical effect of adding equipment on a step is the watch goes into “Drill” mode during that workout step. The watch stops counting strokes and just focuses on lengths completed since your speed will be significantly affected by the equipement used.
Is it possible to add equipment to the Intervals.icu workout editor?